Extrusion-press



F. E. STEVENSON.

EXTRUSION PRESS.

APPLICATION FILED sEPLz, 1919.

Panted Mar. 30,1920.

' 3 SHEETS-SHEET l.

F. E. STEVENSON.

EXTRUSION PRESS.

APPLicAT|oNF|LED'sEPT,2,1919.

1,385,466, Patented Mar. 30, 1920.

3 SHEETS-SHEET 3.

w I l o @M NL l x E g" 1 1J m E 1 Sme/rm E fn/140645.' Steve/nm 33% Hwol/M434 UNTTED sTATEs PATENT oEEroE.

FRANCIS E. STEVENSON, OF MOUNT GILEAD, OHIO, ASSIG-NOR TO THE HYDRAULICPRESS MANUFACTURING COMPANY, 0F MOUNT GILEAD, OHIO, A CORPORATION OFOHIO.

EXTENSION-PRESS.

To all whom t may concern:

Be it known that I, FRANoIs E. STEVEN- soN, 4a citizen of the United,residingv at lMount Gilead, in the county of Morrow and expansion jointsin concrete roads, sidea walks, and in buildings for preventing thecracking or breaking of the concrete. Such strips have heretoforecommonly been made by passing the material through rolls and thenslitting the sheets thus produced to Y provide strips of the desiredwidth and thickness. Ordinarily the asphalt is first melted and pouredinto pans which have been previously coated or prepared in such manneras to prevent the material from sticking to the pans. When cool thematerial is emptied fromthe pans and placed in atempering bath of warmwater, after which it is rolled and divided in the manner beforeexplained. Y

I have found that;` these operations may be performed in a much simplerway.

According to ymy' invention, the asphalt is removed from the containersby cutting and stripping off the metal sheath or casing and is thenrolled into a press which is provided with a plunger operated bycompressed air which forces the cylindrical mass of material into thechamber of they press. The press plunger or ram is then moved into linewith the material and hydraulic pressure is applied for forcing thematerial out through suitable dies in the form of a ribbon or strip Vofthe desired size.

' The die is made in adjustable sections by means of which the widthandthickness of the strip may Ibe varied at will.

In the accompanying drawings Figure l shows a side elevation of an eX-trusion press embodying my improvements.

Fig. 2 is a top lan. view thereof.

Fig. 3 shows a ongitudinal vertical section of the press.

Specication of Letters Patent.

-is admitted to the cylinder E by Patented Mar. 30, 1920.

Application filed September 2, 1919. Serial No. 321,080.

Fig. 4 is a view partly in section and partly in elevation illustratingthe manner in which the material is forced through the die.; i

Fig. 5 is an .end elevation of the press.

Fig. 6 is a 'View partly in top plan and partly in horizontal section,showing particularly the manner in which the cylindrical mass ofmaterial is inserted in the press cylinder. v

Fig. 7 is a cross sectional view, illustrating particularly the mannerin which the press ram or and out of position in line with the presscylinder.

The press is supported on heavy frame pieces A and B tied together byrods C. The end frame A carries the cylinder D plunger is moved sidewiseinto of the press which is formedvwith a cylindrical portion al and atapered` part d. The frame B carries a cylinder E within which operatesthe piston F to whichis attached a platen G, sup orted and guided by twoof the rods C. Hydraulic pressure the pipe c and serves to move thepiston and platen in one direction, 'z'. e., toward thecylinder D. Thepiston and platen are moved in the opposite direction by a piston Hcarried by a cross head I which is connected withthe platen G by rods G.The piston H op,- erates in a cylinder J to which hydraulic pressure isadmitted through a pipe j.

It will be understood that when pressure is admitted at e, the piston F,platen G and piston H are moved in the same direction, e., toward thecylinder D and that when pressure Vis admitted at j (the piston thenbeing moved to its full extent in the cylinder J) the platen G, piston Fand piston H will be returned to their normal positions.

The platen Gcarries an extrusion plunger .K which operates in thecylinder D, but this plunger is movable sidewise on the platen for apurpose hereinafter described. For this purpose the plunger is formedwith a lframe 7c which is guided by grooved flanges 'g on the platen.moved back and forth sidewise by a screw L having a hand-wheel Z andengaging the frame 7c of the plunger.- The screw is supported in a lugrigid with the platen G.

The piston piston is a cylinder M, inclosing a piston N,

is hollow and within this.

The plunger is A operate on asphalt, it may be made to operreadilyremoved from the cylindrical mass i position shown 1n Fig. 6, i. e.,

air is thus admitted the piston N in'oved back tothe position shown inFig. 3,

' cylinder D and close Lto the'end of the mass material through the die'the greater hydrau-A v tion al of said cylinder. It will be observed g,issue@ y the rod n of which extends through the of its stroke and asthis piston is connected platen Gr and carries a head n. Air is adin themanner before described with the mitted to the opposite ends of the,cylinder platen G and therefore with the plunger K, M by pipes m, m. Tindicates a table1 to said piston and plunger will be withdrawn receivethe cylindrical mass of material to from the extrusion cylinder. Theplaten be operated upon. It is supported on two and plunger may thenibemoved by means of of the rods C. v the screw L to one side in the mannerbefore While the press is especially intended to fflescriled and anotheroperation may be perorme ate on various kinds ofplastic material or Anysuitable die may be employed, but on other material, suchV as carbon.Asphalt preferably the die is made in adjustable secis usually placed onlthe market in cases or tions so las to vary the-size of the strip orsheaths made of sheet metal which can be ribbon forced from the press.The die may be made adjustable -to varyA not only the by cutting andstripping 'oif v the sheath. thickness but also the Width. of the strip.When the sheath is thusremoved the cylindrical mass X may be placed onthe table T which has been found suitable for the purand rolled into theposition shown by dotted poses of this invention. lines in Fig. 6, inline with the cylinder D. )As shown more particularly in Figs. 3 and Atthis time the plunger K should be in the 5, the die comprises astationary member, Rf, out of line and a movable member S. Thestationary with the cylinder. It is moved to this (posimember 'R isbolted to the end ofthe cylintion by means of the screw L. At this timevder D. The movable or adjustable member also the piston N is at thelimit of its rear S comprises a cross piece s and two downstroke. If nowair be admittedby means .wardly extending arms s which are inclosed ofthe pipe m to the cylinder M, the piston in guides 1 projecting from theend of the lwith its head n will be moved toward the cylinder. The diemember S may bemoved cylinder D and will move thel cylindrical towardandufromI the member R by means inof screw bolts U, carried by a ange Vprodicated in Fig. 6, which ligure shows the jecting from the end of thecylinder D. 4 mass X moved partiallyinto .the cylinder, The strips ofmaterial produced may be but by the continued movement of the pistoncarried away in anyv suitable way; for inthe mass will be fully insertedinto the porstance, by an endless belt'W, in the manner indicated inFig. 4.

Experience has, demonstrated that strips or ribbons of asphalt, carbonor other simimass X into the cylinder in the manner that the piston N isoperated by compressed air; in this way a saving of hydraulic pressureis obtained although hydraulicpressure may be used for this purpose.mass X has been thus inserted air is admitted to the cylinder M throughthe pipe m', air from the opposite end of the cylinder being exhaustedin any suitable way.

necessary after the cylindrical will be quickly inserted inthe extrusioncylinder and the hydraulic pressure on this mass may then the screw Lmay be operated to move be properlyl controlled to produce the detheplunger Kv into position in front of the sired results.

I claim as my invention of material X. If, now, hydraulic pressure beadmitted to the cylinder Eythrough the terial, comprising an extrusioncylinder havpipe e the plunger K will be operated by hying a bodyportion and a tapered portion draulic pressure to press the materialgradwith a restricted discharge orifice, Ameans ually through a suitabledie at the end of moving longitudinally-of the cylinder D. It will beobserved that by moving l piston to insert the mass of material intoforcing the material into thetaperedp'orthe cylinder D such operationmayv be tion thereofV and out through the restricted quickly performed,but whenV pressing the orifice. I

I have illustrated, however, a form of die lar material may be much moreexpedi- After the tiously produced by a machine of the kind Y hereinshown and described than by the mass is onceV When placed in position inthe press. The mass isy l. Apparatus for forming strips of mai thecylinder for. a l a mass of material endwise into theemploying airpressure and a relatively light body portion thereof, and other meansforl 2. Apparatus for forming strips of ma- A lic pressure is employedwhich operates terial, comprising an extrusion cylinder havmore slowlyandsuch relatively slow operation is, of course, desirable. After themassq provided with a restricted of material has been forced through thedie, hydraulic pressure may be admitted to the longitudinally of thecylinder for moving cylinder J through the pipe j. At of course thepiston H is at the inner end portion of the ycylinder and upto thetapered discharge orithis time a mass of material endwise into the bodyportion thereof, and other means for forcing the material into thetapered portlon thereof and out through the die.

3. Apparatus for forming strips of material, comprising an extrusioncylinder provided with a restricted discharge orifice, a table orsupporty for a mass of materlal, Huid-operated means forfmoving the mass0f material into the cylinder, and Huid-operated means for forcing thematerial through the discharge orifice.

7. Apparatus for forming strips of map 4'. Apparatus for forming stripsof material, comprising an extrusion cylinder provided With a restricteddischarge orlce, a

tableor support for the mass .of material,V

means operated by air, for moving the mass of material into thecylinder, and means operatedby hydraulic pressure for forcing thematerial through the discharge orifice. v

5. Apparatus for forming strips of material, comprising an extrusioncylinder, an air-operated piston for moving the mass of material intothe cylinder, a plunger or ram for forcing thev material through thedischarge orifice, hydraulic means for `operating said piston or ram,and means for moving the piston or ram sidewise into and out of4position in line With the cylinder.

6. Apparatus for forming strips of material, comprising an extrusioncylinder provided With a restricted discharge opening equipped with adie, a table associated with thecylinder, fluid-operated means formoving a mass of material from the table into the c linder,'Huid-operated means for forcing t e material through the die, and meansfor moving sidewise said last-'mentioned uid-operated means for thepurpose'speciterial, comprising' an extrusion cylinder havlng arestricted -discharge orifice, a table associated With the cylinder forsupporting a mass of material, a plunger or ram for forcing materialthrough the die, a platen on Which said plunger or ram is supported,means for moving the ram sidevvise inthe platen into and out o-fpositionin line with the cylinder, a hydraulic cylinder associated With theplaten, a piston carrying the platen and Which operates in saidcylinder, a

cylinder Within said iston, a piston operating in said last-mentionedcylinder, a piston -head connected With the piston and adapted to engagea mass of material and move it intothe extrusion cylinder, andy means`for operating said last-mentioned-piston. Y

8. Apparatus `for forming strips of material, comprising an extrusioncylinder pro- `vided with a restricted vdischarge orifice, a

table associatedl with said cylinder for supporting a mass of material,a plunger or ram for forcing material from the extrusion cylinderthrough the discharge orice, a platen carrying` saidr ram or plunger,means for moving` the ram sidewise in said platen, a

' piston supporting the platen, a cylinder in In testimony whereof Ihave hereunto sul),n

scribed my name. f

FRANCIS E.- sTEvENso-N.v

